A young child sucking on his/her thumb is an example of what?

A) A child who needs a pacifier
B) A child who needs to eat
C) A child who is happy
D) A child who is self-soothing

A young child sucking on his/her thumb is a common way for them to self-soothe and comfort themselves, especially when they are tired, anxious or upset. It is a natural and normal behavior for young children and does not necessarily mean the child needs a pacifier or food.